Human Evolution. I. Darwin "light will be thrown on the origin of man and his history". from On the Origins of Species, 1859 … the weighty arguments derived.

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Presentation on theme: "Human Evolution. I. Darwin "light will be thrown on the origin of man and his history". from On the Origins of Species, 1859 … the weighty arguments derived."— Presentation transcript:

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Human Evolution

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I. Darwin "light will be thrown on the origin of man and his history". from On the Origins of Species, 1859 … the weighty arguments derived from the nature of the affinities which connect together whole groups of organisms- their geographical distribution in past and present times, and their geological succession. The homological structure, embryological development, and rudimentary organs of a species remain to be considered, whether it be man or any other animal, to which our attention may be directed; but these great classes of facts afford, as it appears to me, ample and conclusive evidence in favour of the principle of gradual evolution. The strong support derived from the other arguments should, however, always be kept before the mind. from The Descent of Man, 1871

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Very hypothetical Phylogeny of Homo sapiens and recent ancestors and extinct relatives Evidence for hominid radiation Paranthropus boisei, left and Homo ergaster both lived in what is now Koobi Fora, Kenya, about 1.7 million years ago. = H. erectus

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VI. Origin of Species Homo sapiens Oldest fossils of ergaster/erectus appear simultaneously in Africa,Europe and Asia about mya, all ancestors > 2mya from Africa

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Genetic (mtDNA) diversity in humans versus African great apes Genetic Evidence: Single origin? All pairwise differences between individuals within a species

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Evidence of geographic structure in living human populations Multiorigin?